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Merge pull request #4746 from donaldsharp/zebra_rib_improvements

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Zebra rib improvements
This commit is contained in:
Russ White 2019-07-30 11:11:41 -04:00 committed by GitHub
commit 3d07ec896e
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GPG Key ID: 4AEE18F83AFDEB23
18 changed files with 49 additions and 141 deletions
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6
tests/topotests/bfd-topo2/r1/ipv4_routes.json
View File

@ -8,7 +8,7 @@
"selected": true,
"installed": true,
"prefix": "10.0.3.0/24",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r1-eth0",
@ -30,7 +30,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.2/32",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r1-eth0",
@ -52,7 +52,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.1/32",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,

6
tests/topotests/bfd-topo2/r1/ipv6_routes.json
View File

@ -8,7 +8,7 @@
"selected": true,
"installed": true,
"prefix": "2001:db8:4::/64",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r1-eth0",
@ -27,7 +27,7 @@
"protocol": "bgp",
"internalFlags": 0,
"metric": 0,
"internalStatus": 2,
"internalStatus": 0,
"prefix": "2001:db8:1::/64",
"nexthops": [
{
@ -47,7 +47,7 @@
"selected": true,
"installed": true,
"prefix": "2001:db8:1::/64",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,

10
tests/topotests/bfd-topo2/r2/ipv4_routes.json
View File

@ -5,7 +5,7 @@
"protocol": "ospf",
"internalFlags": 0,
"metric": 10,
"internalStatus": 2,
"internalStatus": 0,
"prefix": "10.0.3.0/24",
"nexthops": [
{
@ -25,7 +25,7 @@
"selected": true,
"installed": true,
"prefix": "10.0.3.0/24",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,
@ -47,7 +47,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.3/32",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r2-eth1",
@ -70,7 +70,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.2/32",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,
@ -92,7 +92,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.1/32",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r2-eth0",

6
tests/topotests/bfd-topo2/r2/ipv6_routes.json
View File

@ -5,7 +5,7 @@
"protocol": "ospf6",
"internalFlags": 0,
"metric": 10,
"internalStatus": 2,
"internalStatus": 0,
"prefix": "2001:db8:4::/64",
"nexthops": [
{
@ -25,7 +25,7 @@
"selected": true,
"installed": true,
"prefix": "2001:db8:4::/64",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,
@ -47,7 +47,7 @@
"selected": true,
"installed": true,
"prefix": "2001:db8:1::/64",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,

8
tests/topotests/bfd-topo2/r3/ipv4_routes.json
View File

@ -25,7 +25,7 @@
"selected": true,
"installed": true,
"prefix": "10.0.3.0/24",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,
@ -47,7 +47,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.3/32",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,
@ -69,7 +69,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.2/32",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r3-eth0",
@ -92,7 +92,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.1/32",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r3-eth0",

2
tests/topotests/bfd-topo2/r4/ipv4_routes.json
View File

@ -8,7 +8,7 @@
"selected": true,
"installed": true,
"prefix": "10.254.254.4/32",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,

6
tests/topotests/bfd-topo2/r4/ipv6_routes.json
View File

@ -5,7 +5,7 @@
"protocol": "ospf6",
"internalFlags": 0,
"metric": 10,
"internalStatus": 2,
"internalStatus": 0,
"prefix": "2001:db8:4::/64",
"nexthops": [
{
@ -25,7 +25,7 @@
"selected": true,
"installed": true,
"prefix": "2001:db8:4::/64",
"internalStatus": 32,
"internalStatus": 16,
"nexthops": [
{
"directlyConnected": true,
@ -47,7 +47,7 @@
"selected": true,
"installed": true,
"prefix": "2001:db8:1::/64",
"internalStatus": 34,
"internalStatus": 16,
"nexthops": [
{
"interfaceName": "r4-eth0",

4
tests/topotests/bgp_vrf_lite_ipv6_rtadv/r1/ipv4_routes.json
View File

@ -9,7 +9,7 @@
"distance": 20,
"metric": 0,
"installed": true,
"internalStatus": 34,
"internalStatus": 16,
"internalFlags": 8,
"nexthops": [
{
@ -33,7 +33,7 @@
"distance": 0,
"metric": 0,
"installed": true,
"internalStatus": 32,
"internalStatus": 16,
"internalFlags": 8,
"nexthops": [
{

4
tests/topotests/bgp_vrf_lite_ipv6_rtadv/r1/ipv6_routes.json
View File

@ -6,7 +6,7 @@
"vrfId":3,
"distance": 20,
"metric": 0,
"internalStatus": 2,
"internalStatus": 0,
"internalFlags": 0,
"nexthops": [
{
@ -27,7 +27,7 @@
"distance": 0,
"metric": 0,
"installed": true,
"internalStatus": 32,
"internalStatus": 16,
"internalFlags": 8,
"nexthops": [
{

4
tests/topotests/bgp_vrf_lite_ipv6_rtadv/r2/ipv4_routes.json
View File

@ -9,7 +9,7 @@
"distance": 0,
"metric": 0,
"installed": true,
"internalStatus": 32,
"internalStatus": 16,
"internalFlags": 8,
"nexthops": [
{
@ -33,7 +33,7 @@
"distance": 20,
"metric": 0,
"installed": true,
"internalStatus": 34,
"internalStatus": 16,
"internalFlags": 8,
"nexthops": [
{

2
tests/topotests/bgp_vrf_lite_ipv6_rtadv/r2/ipv6_routes.json
View File

@ -9,7 +9,7 @@
"distance": 0,
"metric": 0,
"installed": true,
"internalStatus": 32,
"internalStatus": 16,
"internalFlags": 8,
"nexthops": [
{

31
zebra/connected.c
View File

@ -260,16 +260,6 @@ void connected_up(struct interface *ifp, struct connected *ifc)
rib_add(afi, SAFI_MULTICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_CONNECT,
0, 0, &p, NULL, &nh, zvrf->table_id, metric, 0, 0, 0);
if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
char buf[PREFIX_STRLEN];
zlog_debug(
"%u: IF %s address %s add/up, scheduling RIB processing",
ifp->vrf_id, ifp->name,
prefix2str(&p, buf, sizeof(buf)));
}
rib_update(zvrf->vrf->vrf_id, RIB_UPDATE_IF_CHANGE);
/* Schedule LSP forwarding entries for processing, if appropriate. */
if (zvrf->vrf->vrf_id == VRF_DEFAULT) {
if (IS_ZEBRA_DEBUG_MPLS) {
@ -433,17 +423,6 @@ void connected_down(struct interface *ifp, struct connected *ifc)
rib_delete(afi, SAFI_MULTICAST, zvrf->vrf->vrf_id, ZEBRA_ROUTE_CONNECT,
0, 0, &p, NULL, &nh, zvrf->table_id, 0, 0, false);
if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
char buf[PREFIX_STRLEN];
zlog_debug(
"%u: IF %s IP %s address down, scheduling RIB processing",
zvrf->vrf->vrf_id, ifp->name,
prefix2str(&p, buf, sizeof(buf)));
}
rib_update(zvrf->vrf->vrf_id, RIB_UPDATE_IF_CHANGE);
/* Schedule LSP forwarding entries for processing, if appropriate. */
if (zvrf->vrf->vrf_id == VRF_DEFAULT) {
if (IS_ZEBRA_DEBUG_MPLS) {
@ -468,16 +447,6 @@ static void connected_delete_helper(struct connected *ifc, struct prefix *p)
connected_withdraw(ifc);
if (IS_ZEBRA_DEBUG_RIB_DETAILED) {
char buf[PREFIX_STRLEN];
zlog_debug(
"%u: IF %s IP %s address del, scheduling RIB processing",
ifp->vrf_id, ifp->name,
prefix2str(p, buf, sizeof(buf)));
}
rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
/* Schedule LSP forwarding entries for processing, if appropriate. */
if (ifp->vrf_id == VRF_DEFAULT) {
if (IS_ZEBRA_DEBUG_MPLS) {

19
zebra/interface.c
View File

@ -799,15 +799,6 @@ void if_handle_vrf_change(struct interface *ifp, vrf_id_t vrf_id)
/* Install connected routes (in new VRF). */
if (if_is_operative(ifp))
if_install_connected(ifp);
/* Due to connected route change, schedule RIB processing for both old
* and new VRF.
*/
if (IS_ZEBRA_DEBUG_RIB_DETAILED)
zlog_debug("%u: IF %s VRF change, scheduling RIB processing",
ifp->vrf_id, ifp->name);
rib_update(old_vrf_id, RIB_UPDATE_IF_CHANGE);
rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
}
static void ipv6_ll_address_to_mac(struct in6_addr *address, uint8_t *mac)
@ -950,11 +941,6 @@ void if_up(struct interface *ifp)
/* Install connected routes to the kernel. */
if_install_connected(ifp);
if (IS_ZEBRA_DEBUG_RIB_DETAILED)
zlog_debug("%u: IF %s up, scheduling RIB processing",
ifp->vrf_id, ifp->name);
rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
/* Handle interface up for specific types for EVPN. Non-VxLAN interfaces
* are checked to see if (remote) neighbor entries need to be installed
* on them for ARP suppression.
@ -1008,11 +994,6 @@ void if_down(struct interface *ifp)
/* Uninstall connected routes from the kernel. */
if_uninstall_connected(ifp);
if (IS_ZEBRA_DEBUG_RIB_DETAILED)
zlog_debug("%u: IF %s down, scheduling RIB processing",
ifp->vrf_id, ifp->name);
rib_update(ifp->vrf_id, RIB_UPDATE_IF_CHANGE);
if_nbr_ipv6ll_to_ipv4ll_neigh_del_all(ifp);
/* Delete all neighbor addresses learnt through IPv6 RA */

13
zebra/rib.h
View File

@ -124,18 +124,16 @@ struct route_entry {
/* RIB internal status */
uint32_t status;
#define ROUTE_ENTRY_REMOVED 0x1
/* to simplify NHT logic when NHs change, instead of doing a NH by NH cmp */
#define ROUTE_ENTRY_NEXTHOPS_CHANGED 0x2
/* The Route Entry has changed */
#define ROUTE_ENTRY_CHANGED 0x4
#define ROUTE_ENTRY_CHANGED 0x2
/* The Label has changed on the Route entry */
#define ROUTE_ENTRY_LABELS_CHANGED 0x8
#define ROUTE_ENTRY_LABELS_CHANGED 0x4
/* Route is queued for Installation into the Data Plane */
#define ROUTE_ENTRY_QUEUED 0x10
#define ROUTE_ENTRY_QUEUED 0x8
/* Route is installed into the Data Plane */
#define ROUTE_ENTRY_INSTALLED 0x20
#define ROUTE_ENTRY_INSTALLED 0x10
/* Route has Failed installation into the Data Plane in some manner */
#define ROUTE_ENTRY_FAILED 0x40
#define ROUTE_ENTRY_FAILED 0x20
/* Nexthop information. */
uint8_t nexthop_num;
@ -303,7 +301,6 @@ typedef struct rib_tables_iter_t_ {
/* Events/reasons triggering a RIB update. */
typedef enum {
RIB_UPDATE_IF_CHANGE,
RIB_UPDATE_RMAP_CHANGE,
RIB_UPDATE_OTHER
} rib_update_event_t;

13
zebra/rt_netlink.c
View File

@ -1833,6 +1833,19 @@ enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx)
if (p->family == AF_INET || v6_rr_semantics) {
/* Single 'replace' operation */
cmd = RTM_NEWROUTE;
/*
* With route replace semantics in place
* for v4 routes and the new route is a system
* route we do not install anything.
* The problem here is that the new system
* route should cause us to withdraw from
* the kernel the old non-system route
*/
if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) &&
!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx)))
(void)netlink_route_multipath(RTM_DELROUTE,
ctx);
} else {
/*
* So v6 route replace semantics are not in

6
zebra/zebra_nhg.c
View File

@ -272,8 +272,6 @@ static int nexthop_active(afi_t afi, struct route_entry *re,
SET_FLAG(nexthop->flags,
NEXTHOP_FLAG_RECURSIVE);
SET_FLAG(re->status,
ROUTE_ENTRY_NEXTHOPS_CHANGED);
nexthop_set_resolved(afi, newhop, nexthop);
resolved = 1;
}
@ -501,10 +499,8 @@ int nexthop_active_update(struct route_node *rn, struct route_entry *re)
&& nexthop->type < NEXTHOP_TYPE_BLACKHOLE)
&& !(IPV6_ADDR_SAME(&prev_src.ipv6,
&nexthop->rmap_src.ipv6)))
|| CHECK_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED)) {
|| CHECK_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED))
SET_FLAG(re->status, ROUTE_ENTRY_CHANGED);
SET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED);
}
}
return re->nexthop_active_num;

46
zebra/zebra_rib.c
View File

@ -1128,8 +1128,6 @@ static void rib_process(struct route_node *rn)
re->status, re->flags, re->distance,
re->metric);
UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED);
/* Currently selected re. */
if (CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) {
assert(old_selected == NULL);
@ -2968,50 +2966,6 @@ void rib_update_table(struct route_table *table, rib_update_event_t event)
RIB_ROUTE_ANY_QUEUED))
continue;
switch (event) {
case RIB_UPDATE_IF_CHANGE:
/* Examine all routes that won't get processed by the
* protocol or
* triggered by nexthop evaluation (NHT). This would be
* system,
* kernel and certain static routes. Note that NHT will
* get
* triggered upon an interface event as connected routes
* always
* get queued for processing.
*/
RNODE_FOREACH_RE_SAFE (rn, re, next) {
struct nexthop *nh;
if (re->type != ZEBRA_ROUTE_SYSTEM
&& re->type != ZEBRA_ROUTE_KERNEL
&& re->type != ZEBRA_ROUTE_CONNECT
&& re->type != ZEBRA_ROUTE_STATIC)
continue;
if (re->type != ZEBRA_ROUTE_STATIC) {
SET_FLAG(re->status,
ROUTE_ENTRY_CHANGED);
rib_queue_add(rn);
continue;
}
for (nh = re->ng.nexthop; nh; nh = nh->next)
if (!(nh->type == NEXTHOP_TYPE_IPV4
|| nh->type == NEXTHOP_TYPE_IPV6))
break;
/* If we only have nexthops to a
* gateway, NHT will
* take care.
*/
if (nh) {
SET_FLAG(re->status,
ROUTE_ENTRY_CHANGED);
rib_queue_add(rn);
}
}
break;
case RIB_UPDATE_RMAP_CHANGE:
case RIB_UPDATE_OTHER:
/* Right now, examine all routes. Can restrict to a

4
zebra/zebra_rnh.c
View File

@ -868,11 +868,9 @@ static void zebra_rnh_clear_nhc_flag(struct zebra_vrf *zvrf, afi_t afi,
re = zebra_rnh_resolve_nexthop_entry(zvrf, afi, nrn, rnh,
&prn);
if (re) {
UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED);
if (re)
UNSET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED);
}
}
/* Evaluate all tracked entries (nexthops or routes for import into BGP)
* of a particular VRF and address-family or a specific prefix.